Which of the following is an example of a function? (Points : 2)
{(3, 4), (4, 8), (6, 6), (7, 10)}
{(0, 2), (1, -4), (1, -3), (3, 6)}
{(-1, 4), (0, 3), (0, -2)}
{(5, 7), (6, 8), (6, 9), (7, 10)}

Question

Which of the following is an example of a function? (Points : 2)
      {(3, 4), (4, 8), (6, 6), (7, 10)}
      {(0, 2), (1, -4), (1, -3), (3, 6)}
      {(-1, 4), (0, 3), (0, -2)}
      {(5, 7), (6, 8), (6, 9), (7, 10)}

anonymous · Answer

{(3, 4), (4, 8), (6, 6), (7, 10)}

anonymous · Answer

thank you

anonymous · Answer

yw

mathteacher1729 · Answer

@eliassaab why is that a function and  {(0, 2), (1, -4), (1, -3), (3, 6)} NOT a function?

anonymous · Answer

because 1 has 2 images -4 and -3

anonymous · Answer

Every element in the domain must  have one image in the range.

anonymous · Answer

@mathteacher1729  did you understand my explanation?

mathteacher1729 · Answer

@eliassaab I teach this stuff. :)  

When you are answering a student, make sure that *they* understand your answer. Otherwise you're just doing math problems for yourself (which is fun, but might not always be helpful to the person asking for help if they seek to understand why the answer is correct).

anonymous · Answer

You seem to be a better teacher than me. Excellent.